本期内容：

“Master”, a mysterious player of the game of Go, responsible for defeating all comers in online matches over the past two weeks, was revealed to be an artificial intelligence. A new version of Deepmind’s AlphaGo system, Master was unbeaten in 51 online games, including one against Ke Jie, the world champion.

Go: 围棋
Reveal：揭示
Artificial intelligence：人工智能
Unbeaten：不败的

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